United Space Allaince's Matt Gaetjens with the Astronaut Support Office greets STS-135 Mission Specialist Rex Walheim and Chris Ferguson on the Shuttle Landing Facility.

United Space Allaince's Matt Gaetjens with the Astronaut Support Office, left, greets STS-135 Mission Specialist Rex Walheim and Commander Chris Ferguson on the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. The flight crew of four arrived aboard T-38 training jets to watch two historic milestones of NASA's Space Shuttle Program -- the final landing of shuttle Endeavour, which will bookend its STS-134 mission to the International Space Station, and the final rollout of their vehicle, space shuttle Atlantis, to Launch Pad 39A.

STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of the shuttle program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett